Well-casing perforator.



E. A. BEAUDETTE.

WELL CASING PERPORATOR.

APPLICATION FILED JUNE 5. 1914.

1,121,321, Patented Dec.15.1914.

EDWAIRD A. IB EA'UDETTE, 0F PORTLAND, OREGON.

WELL-CASING PERFOR-ATOR.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed June 5, 1914. Serial N0. 843,255.

To all whom it may concern Be it known that I, EDWARD A. BEAUDETTE, citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful improvements in Well-Casing Perforators, of which the following is a specification.

This invention relates to devices for perforating the casings of oil or water wells, and has for its object the provision of a device for the stated purpose which will be simple in construction and efiicient in operation and which may be easily manipulated to accomplish the desired results.

Particular'objects of the invention are to provide novel means for permitting the perforating members to remain in an inoperative position when the device is being lowered and to positively actuate the same to cause them to form perforations in the well casing.

The invention also has as its object the construction and arrangement of the parts in such a manner that the device may be readily withdrawn from the casing when so desired.

The invention is illustrated in the accompanying drawings and consists in certain novel features which will be hereinafter first fully described and then more particularly pointed out in the claims following the description.

In the drawings: Figure 1 is a side elevation of my improved device partly broken away and showing the perforating dogs or members in the position assumed when the device is being lowered into a well. Fig. 2 is a vertical longitudinal section showing the perforating members in operative position. Fig. 3 is a detail view showing the construction whereby bearings for the mounting of the perforating members are provided.

Corresponding and like partsare referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters.

In carrying out my invention, I employ a substantially cylindrical body 1 which is provided at its upper end with a threaded pin or plug 2, whereby it may be secured to any convenient or preferred operating device. This body 1 is provided in its lower portion with spaced radial slots 3 opening through its lower end and also communicating with an internal bore 1 formed in the lower portion of the body. lVithin the said bore is fitted a rod 5 which is secured within the body 1 by a transverse pin 6 inserted through the said bore and the upper end of the rod and this said rod projects through and beyond the lower end of the body and forms a support for the spring carrier 7. The said spring carrier consists of a block of any preferred form having pins or bolts 8 mounted in its opposite sides and projecting laterally therefrom. Leaf-springs 9 have their lower ends mounted loosely upon the said bolts, pins or studs, and are retained thereon by nuts 10 fitted upon the outer extremities thereof, as will be readily understood. Coiled springs 11 are provided around the said pins or studs between the carrier 7 and the ends of the leaf springs so as to permit the said springs to yield inwardly when the device is being inserted in the well but aid in producing the necessary frictional engagement between the leaf springs and the well casing when the device is at rest or is being operated. The upper ends of the springs 9 are rigidly secured to the lower end of a chuck or ejector consisting of a head or disk 12 fitted looselyupon the reduced portion of the rod 5 and prongs or tongues 13 rising from the said head and having their upper ends beveled, as shown at 14, to engage the dogs or perforating members 15 in the operation of the device. A locking pawl 16 is pivoted to the head 12 and depends therefrom to engage a notch 17 formed in the rod 5 whereby the ejector will be held out of engagement with the perforating dogs when the device is being lowered into the well. A collar 18 is provided upon the said rod 5 below the ejector 12 so as to limit the downward movement of the said ejector relative to the rod, as will be readily understood. The perforating dogs or members 15 are provided at their outer ends with cutting edges 19 whereby when they are projected from the body 1 they will cut through the well casing and perforate the same. These dogs are hardened steel members arranged to play in the upper ends of the slots 3 of the body 1 and are provided 1 at their inner ends with cylindrical enlargements or bosses 20 adapted to seat in recesses 21 formed in the sides of the upper portion of the rod 5 and open at both ends. The dogs or perforating members are of such a width'that they will-be held against lateral movement by the walls of the slots 3 and as they are pivoted to the rod 5 at their extreme inner ends, their own weight will cause them to swing downwardly toward'the lower ends of the said SlutS and be housed within the body when they are not in engagement with the ejector. 'lhe recesses 21 in the rod 5 have circular walls whereby retaining outwardfrom the rod.

lips 22 are formed on the rod andthese retaining lips overhang the bosses 20, on the dogsiso that the dogs cannot move radially hould it be necessary to remove a dog from t e rod, the securing pin 6 is driven out, after which the rod may be withdrawn from. the body 1 and the dog moved laterally so asto release the boss 20 from the recess \r bearing in which it .is engaged. Accidental loss of the perforating dogs will be positively prevented by the construction described.

When the device is being driven down in I ,a well, the springs 9, by their engagement .with the well'casmg, will tend to move upwardly relative-to the rod 5 and the body 1;

- This upward movement, however, is checked by the engagement of the locking pawl 16 with the recess 17 in'the rod so that the ejector to which tlie locking pawl is pivoted will-not be permitted to move upwardlyand throw the dogs outwardly against the casing. The dogs will, of course, hang downwardly from their bearings in the rod 5 so that no portion thereof will project 'be a short gentle upward pull is exerted upon the device and ass; result the body 1 and the and. will then swing inwardlyiand down- From the foregoiiikji j'cription yond the body 1,,as will be readily understood by reference to Fig. 1. When the device has been. driven down to the point where it is desired to perforate the casing,

rod 5 will move upwardly, whereas the frictional engagement of the springs 9 with the well casing will hold the ejector against such ,upward movement and the locking pawl 16 will then drop outof engagement with the notch 17. If a sharp,sudden jar-' ring movement be'now imparted to the de-v vice, the body 1 and the rod 5 will move} downwardlyewhile the ejector will be held stationary by the casin'gig'engaging springs 9, whereuponthe dogs will be caused to engage the flipper ends of the'jejector arms'13 andfwillpatonce be '-moved outwardly so as to penetrate the well casing. Upon upward movement being again imparted to the body l'the dogs will be moved from the ejector wardly through gravity, as will A be readily understood, and if the upward movement of the body 1 be then continued, the .collar or stop 18 will be drawnagainst the lower of the ejector and the entire device ix'ayj then be readily removed from-the'welli taken in connection with- -tlie accompanying drawejector relative to the body. 1

- on the support and secured to the" said ings, it will be seen that I have provided an exceedingly simple and compactly arranged device which may be operated readily from the surface of the ground and which willbe found highly eiiicient for the:

purposes for which it isdesigned.

Having thus described the invention, what is claimed as'new is 1. A device for the purpose set forth comprising a body, a support extending therefrom, perforatlng members mounted on the support and normally lying entirely within the body, 'an ejector movable on the support to eject said perforating members, and means for limiting the movement of the 2. A device for the purpose set forth cornprising a support, perforating members mounted thereon, an-ejector mounted on the support and adapted to act upon the said perforating members, and a latch on the ejector and adapted to engage thesupport to hold the ejector inoperative.

3; A device for the purpose set forth comprising a' body, perforating members mounted within the body, a support for said members projecting from the body and provided with a notch belowthe body, an ejec-- tor slidably mounted on said support below and adapted to engage the said perforating members, and-a latch pivoted on the ejector and adapted to engage the notch in said support whereby to: hold the ejector in an forating members, and a casing-engaging -device mounted on said support and secured to said ejector to hold the same stationary relative to the casing.

5. A device for the purposeset forth comprising a body, perforating members mounted therein, a support for the members secured in the body and projecting.

therefrom, an ejector'slidably fitted on said support and adapted to actuate said perfo-:

ratingmembers, means for'lockingtheejector against movement relative to said support, and casmg-engaging memberssecured to the ejector and adapted to. restrain, the

same against movement when the said lockmg means is released.

6. The combination of a bodyj,'perforat- 'ing, members mounted therein, a support for said members' projecting from the body, an

ejfeetor mounted on saidsupport and adapt-- to actuate said perforating members, means for locking the ejector to the support, and casing-engaging springs mounted ejectoro members mounted therein, a support for said members extending from the body, an ejector slidably mounted on said support and adapted to engage the perforating members, a stop on the support arranged to engage the outer end of the ejector, means for locking the ejector to the support, and means for restraining downward movement of the ejector when said locking means isreleased.

8. The combination of a body, perforating members mounted therein, an ejector fitted in the body and adapted to engage said perforating members, a support for said ejector and said perforating members extending from the body, a carrier fitted on the said support, leaf springs secured to the ejector and depending therefrom, and means for loosely connecting the lower ends of the said springs to the said carrier.

9. The combination of abody, perforating members mounted therein, a support for said members extending from the body, a carrier on said support, an ejector slidably mounted on the support and adapted to actuate the perforating members, lateral projections on said carrier, leaf springs secured to the ejector and having their lower ends'looselyv engaging said projections, and' springs coiled around the said projections between the carrier and the lower ends of the leaf springs.

10. The combination of a body having a hollow lowerend and radial slots in said end, a support projecting through the hollow lower end of the body, pivotally mounted perforating members playing in said slots, and an ejector loosely mounted on said support below the body and having arms fitted 'in said slots and adapted to engage the said perforating members.

11. The combination of a body having a hollow lower end, a rod secured in said body and provided in its sides with peripheral recesses having overhanging lips at their outer sides and having open ends, dogs mounted in the body and provided at their inner ends with bosses adapted to seat in the said recesses and thereby pivotally connect the dogs to said rod, and means for swinging the said dogs whereby to project them beyond the body. i

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD A. BEAUDETTE. [L.B.] 

